Backpack



FIG. 1 is a front and top perspective view of a backpack, showing my new design;

FIG. 2 is a rear and top perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof; and,

FIG. 9 is an enlarged view of a portion indicated in FIG. 2.

The broken lines in the figures illustrate portions of the backpack that form no part of the claimed design. The dash dot dash lines in FIGS. 2 and 9 are for the purpose of depicting the cut line of the enlarged view and form no part of the claim. 

CLAIM The ornamental design for a backpack, as shown and described. 